chore: bump version to 0.9.0

Covers PR #36's TP1X temperature-fallback fix and display-light switch,
plus TP2X_RAC_20K device-type recognition and full TP1X_DA-AC-RAC-01001
capability coverage (issues #37, #38).

custom_components/localthings/manifest.json

@@ -12,5 +12,5 @@
     "pyOpenSSL>=23.0",
     "smartthings-local>=0.1.0"
   ],
-  "version": "0.8.0"
+  "version": "0.9.0"
 }